S
M
T
W
T
F
S
26
33°
20°
27
46°
19°
28
53°
24°
29
63°
30°
30
74°
32°
1
66°
41°
2
70°
47°
3
67°
40°
4
57°
36°
5
61°
43°
6
74°
47°
7
67°
45°
8
62°
42°
9
61°
44°
10
60°
44°
11
66°
43°
12
65°
45°
13
66°
44°
14
69°
48°
15
61°
43°
16
66°
44°
17
68°
47°
18
67°
43°
19
58°
46°
20
58°
45°
21
59°
46°
22
60°
48°
23
63°
48°
24
65°
47°
25
69°
49°
26
70°
50°
27
70°
45°
28
59°
44°
29
61°
43°
30
62°
46°
31
67°
50°
1
65°
49°
2
63°
49°
3
66°
51°
4
63°
51°
5
62°
50°
6
63°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Prince Rupert
Prince Rupert's May 2026 forecast shows daily high temperatures ranging from 57° to 74°, with overnight lows between 36° and 52°. The average high for May is 64° with an average low of 46°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Prince Rupert. See also: June | July | August.